Re: [PATCH v1 1/2] dt-bindings: spi: snps,dw-apb-ssi: Add support for snps,dwc-ssi-2.00a

[Changhuang Liang]

Hi, Conor

Thanks for the review.

> On Fri, Jun 12, 2026 at 05:58:55AM -0700, Changhuang Liang wrote:
> > Add a new compatible string "snps,dwc-ssi-2.00a" for the Synopsys
> > DesignWare SSI controller version 2.00a.
> 
> Two things. Firstly, driver patch suggests a fallback to 1.01a is possible. Why
> haven't you added one?

Will support fallback.

> Secondly, I am going to expect that when your starfive user for this appears in
> my inbox that it has a device-specific compatible, so you may as well add that
> now.

Our standard SPI control is completely based on the Synopsys DesignWare SSI controller version 2.00a. 
However, for the controller that accesses the flash, a set of modifications has been made based on the 
Synopsys DesignWare SSI controller version 2.00a, and the driver part also requires specific adaptation.

Therefore, on the JHB100 SoC, the initial device tree source I have planned looks like this:

spi0: spi@17f20000 {
      compatible = "snps,dwc-ssi-2.00a";
      reg = <0x0 0x17f20000 0x0 0x10000>;
};

sfc0: spi@18000000 {
      compatible = "starfive,jhb100-spi";
      reg = <0x0 0x18000000 0x0 0x10000>;
};

Thus, I plan to add a new "starfive,jhb100-spi" compatible string for the controller that accesses the flash.
For now, I intend to keep these as two separate series.

Best Regards
Changhuang